Aeobgs



"Feb 27, 1923. 1,446,919.

E. E. MlLLER ET AL.

EXPANSIBLE PACKING.

FILED SEPT. 15, 1921.

FIG. 2. Z

I N VEN TOR 55 W! 5 MILLER 6.5mm: PCRONER A TTORNE Y.

' hereinafter described.

our improved expensible pecking taken: on:

Fig. 2.

Patented 27,1923. 7

ERVIIN is. j MILLEB" Arm GEoRGE rlrrfr'ofn women, or FULLERTON, oi irrronitiet Y EXPANsIBLE rzjtciiirr'te T0 allwlaom it may concern: i

Be it known that weQlhzwtm E. MILLER" and GEORGE E. CRONER, citizens oft-he United- States, residing atc'l ullerton; in the county.

of Grange and State Oi Celi'fornie, hevek invented new endNuseful Improvements in: lilxpsnsible Pschings; of which the follow; ing is a specification. Y

This invention relates toen rexpansihle packing for e piston which: is ordinarily: used in pumps or'similztr machinery where 'ri't or other .ttoreign substances cause-rapid =-r of the peching which will allow? the working; fluid to leel z by theipiston.' lit isthe object of this invention to pro vide a novel means whereby the pecking: cenbe expendedas thisweertekes'plece; I

(Ether objects and edventageswvill beseeiii and the invention reedilyunderstood from the following? description of the accompany.- ingg; drawings, in which: c Fig.1 is a central; longitudinal section of a pump cylindershowingiin elevation-our. improved expensible pecking. employedini nation witha piston; v 2 is an enlarged central section-of partly broken away to show'our improved expensible pecking member. v

Fig; 4. is a section takenlon line i -40f A practical embodiment of ouiwirnprovd erpansible packing ineniberis illustrated as mounted within a cylinder 1, hevlng an end plate 2, with a central openingadaptedto receive it plus 3, theuse' of which will be The piston. i, is shown escoinprisingfan end disk 5 ,.heving a forwardly-projecting1 hub portion 6 with a tapered exiel'bore 7, adapted to iitupon thetepered portion ofe;

pistonrod 8 Y I A second end plete'8 is'mounted uponthe reduced end 8 of the piston rodsnd is adopted to beheld against the huh-as by i look nuts 9, screw=threeded upon theportion 8 I I (the periphery of the end plates ere tape ed inwerdlytoward each other as snow zit l0 and piston follower rings 11, having; eo-opereting tapering surfaces are mounted thereon so asto form at complete end plate With the removable wearing ring.

The expensible packing member comsurface.

prises a, cami 1E2." havingr'an, axial, bore adapted to be received upon the hub 6.

A plurality: of; cur-.vedvomn surfaces 13, are formed" on the outer surfacer of the. cam:

Surrounding the cam blocks is the usual? packing 15, which ca'n be readily-"replaced when the semis has 'been worn outn and the ezipensib'le portion: of: our packingr inember comprises arplurehty' of cam block?" ltiis thus seenithet ifthe cein'12 end the cem blocks 1eareshifted reletivefto ee'oh other,

that the. packing. 15 will, be forcedfradiallyl outward; and to provide means; for. eccom':

plishing this: purpose; the cam surfaces; 13"

terminete in: a: shoulder} 16" otthe" cam 12,; end a shoulder 17 the earn block 14h.

These "shoulders ereiongi'tudinelly tapered and" adapted to receive e co-opereting tapered; expending screw; lSQscreW-threeded" through the endpla te? 8; Thesescrews are shown as three a in- 5 number. end positioned,

intermediate the sides of the respectivecani block sections;

In the operetionyit will be seenrthaues:

the screws zire advanced inwardly; the and cam blo-ckswill be shifted relative to each other so expend. v Between. the times that the' screwsare ed'just'edfor-tekingiup the weer ofthe pack:- ing -nie1nberg are "provided: ion, nores to cause the packing. 15 to melly creating a radial pressure during this elapsed time, and such means comprises springs 19, positioned in radial slots 20 formed in'the'eeiYIlQ, and these springs are" sh own as positioned one set at each" cam:

To allow these sprin "tobe easily/inserted Wltllin'tl1B"SQC't101l the outer corner of:

the hiib'sis tapered as et 21, end it: will thus beseen thati'wheii the cam is placed upon the hub,' the springs cen be inserted within the slots and easily forcedupw-zird within the same by placingthejinner end on thein clined' surface 21 and" then shifting the earn axially elong-theihuh;

To allow the greatest amount o'fexpsnsion by thescrews within the least axial spece holes 22 are formed within the disk 5 end in axial alinement with the screws so that the ends of the same can enter these openings when the expanding limit of the screws is about reached.

Means for adjusting these screws while the expansible packing is employed within a piston cylinder, is obtained by removlng the plug 3 and inserting any suitable socket wrench so as to rotate the screws and thereby causing the necessary expansion of the.

packing 15.

It may be necessary to remove the ring 11 from the disk 5, and to do so without hammering the ring, bolt holes 23 are formed in the ring so that a bolt may be inserted in the same and any suitable means may be applied to the bolts for causing axial pressure for the removal of the ring;

Various changes may be made in the details of construction by those skilled in the art, without departing from the spirit of the invention as set forth in the appended claims.

W e claim as our invention:

1. An expansible packing for pistons, comprising a cam, a cam block, a packing surrounding said cam block, said cam and block having tapered portions, and tapered screws adapted to lit said portions so as to wedge said cam and block apart and cause relative rotation of the same to expand said packing.

2. An expansible packin for pistons,

comprising a cam, cam blocks, springs mounted in said cam and causing radial pressure upon said cam blocks, and means for rotatably shifting said cam and block relative to each other.

3. A. piston having end plates, an intermediate portion between said plates, and removable wearing annuli carried solely on the peripheries of said end plates.

4:. An expansible packing for pistons comprising a cam, cam blocks, springs mounted in said cam and causing radial pressure upon the cam blocks, and packing surrounding the cam blocks, said cam and blocks having tapered portions, and tapered screws adapted to fit said portions so as to wedge the cam and blocks apart and cause relative rotation of the same to expand said packing.

5. A piston comprising end plates having conical-shaped peripheries, and removable wearing nnuli carried-on the peripheries of the end plates and having internal peripheries corresponding in shape to the external peripheries of the plates soas to contact with the latter throughout their transverse areas. 6.. A piston comprising end plates having conical-shaped peripheries, removable wearannuli carried on the peripheries of the end plates and having internal peripheries corresponding in shape to the external peripheries of the plates, a cam mounted between the plates for rotation, cam blocks surrounding the cam, a packing surrounding the cam blocks, and means for eiiecting relative rotation of the cam and blocks. I

7. A piston comprising end plates having conical-shaped peripheries, removable wearing annuli carried on the peripheries of the end plates and having internal peripheries corresponding in shape to the external peripheries of the plates, a cam mounted between the plates for rotation, cam blocks surrounding the cam, a packing surrounding the cam blocks, and cam screws interposed between the cam blocks and cam for effecting relative rotation of the two.

8. A piston comprising end plates having conical-shaped peripheries, removable wearing annuli carried on the peripheries of the end plates and having internal peripheries corresponding in shape to the external peripheries of the.plates, a cam mounted between the plates for rotation, cam blocks surrounding the cam, a packing surroundingthe cam blocks, and cam screws interposed between the cam blocks and cam for effecting relative rotation of the two, one of said end plates being provided with openings adapted to receive the cam screws for the purposes described.

9. A piston comprising end plates having conical-shaped peripheries, removable wearing annuli carried on the peripheries of the end plates and having internal peripheries corresponding in shape to the external peripheries of the plates, a cam mounted between the plates for rotation, cam blocks surrounding the cam, a packing surround ing the cam blocks, cam screws interposed between the cam blocks and cam for effecting relative rotation of the two, said cam blocks being formed with slots, and expansible springs within said slots and engagin said cam for the purpose described.

10. A piston comprising end plates having conical-shaped peripheries, reino'mble wearing annuli carried on the peripheries of the end plates and having internal ps ripheries corresponding in shape to the external peripheries of the plates, a cam mounted between the plates for rotation, cam blocks surrounding the cam, a packing surrounding the cam blocks, and cam screws interposed between the cam blocks and cam for effecting relative rotation of t 1e two, one of said end plates being provided with openings adapted to receive the cam crews "for the purposes described, one of sa wearing annuli being formed with bolt receiving openings for the purpose described. 7

In testimony whereof we have signed our names to this specification.

Elli VIN E. li HLLETR. GEORGE PATTON CRONER. 

